National Vulnerability Database

National Vulnerability Database

CVE-2019-9793 Detail

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

Current Description

A mechanism was discovered that removes some bounds checking for string, array, or typed array accesses if Spectre mitigations have been disabled. This vulnerability could allow an attacker to create an arbitrary value in compiled JavaScript, for which the range analysis will infer a fully controlled, incorrect range in circumstances where users have explicitly disabled Spectre mitigations. *Note: Spectre mitigations are currently enabled for all users by default settings.*. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Analysis Description

A mechanism was discovered that removes some bounds checking for string, array, or typed array accesses if Spectre mitigations have been disabled. This vulnerability could allow an attacker to create an arbitrary value in compiled JavaScript, for which the range analysis will infer a fully controlled, incorrect range in circumstances where users have explicitly disabled Spectre mitigations. *Note: Spectre mitigations are currently enabled for all users by default settings.*. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

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Change History

CVE Modified by MITRE -
5/13/2019 6:29:05 AM

CVE Modified by MITRE -
5/7/2019 3:29:17 AM

Action

Type

Old Value

New Value

Added

Reference

https://access.redhat.com/errata/RHSA-2019:0966 [No Types Assigned]

Initial Analysis -
4/30/2019 8:09:35 PM

Action

Type

Old Value

New Value

Added

CPE Configuration

OR
*cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* versions up to (excluding) 66.0
*cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* versions up to (excluding) 60.6
*cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* versions up to (excluding) 60.6